我厂生产的220T/h 锅炉,有许多的梁柱结构件,其结构如图示:梁柱由两根工字钢及上下盖板组成、梁柱长度一般为8m～14m,横截面为箱形结构,该构件的1~#～4~#主焊缝,工艺规定必须使用自动焊以保证一定的熔深。对于上述梁柱结构,目前国内一些厂家使用双头自动焊进行焊接。双头自动焊需配备一套复杂的工装,造价昂贵且加工困难,对一般小型工厂来说是难以做到 I plant the 220T / h boiler, there are many beams and columns of the structure, the structure shown in Figure: beam by the two beams and the upper and lower cover, beam length is generally 8m ~ 14m, the cross-section of the box Shaped structure, the component of 1 ~ # ~ 4 ~ # main weld, the process must be used to ensure that the automatic welding penetration. For the beam structure, at present, some domestic manufacturers use double-headed automatic welding for welding. Two-headed automatic welding to be equipped with a complex set of tools, expensive and difficult processing, the general small factories is difficult to do